Water filter



FIG. 1 is a right side perspective view of a water filter containing the design sought to be patented;

FIG. 2 is a left side perspective view of the water filter;

FIG. 3 is a front elevational view of the water filter;

FIG. 4 is a side elevational view of the water filter;

FIG. 5 is a top plan view of the water filter;

FIG. 6 is a rear elevational view of the water filter; and,

FIG. 7 is a bottom plan view of the water filter. 

The ornamental design for a water filter, as shown. 